Grinding-mill.



A. BOOK & WJA. KRAMER.

GRINDING MILL. APPLICATION FILED 11111130, 1907.

Patented June 22,1909.

3 SHEETS-811E513 1.

A. BOUK & W. A. KRAMER.

GRINDING MILL.

APPLICATION TILED 35.11.30, 1907.

Patented June 22, 1909.

Wit" @0520 A. BOOK & W. A. KRAMER.

GRINDING MILL. APPLICATION FILED JAN 30, 1907,

Witness 1 UNITED STATES PATENT OFFICE.

A'L'BERTUBOOK, or BRUNSWICK, GERMANY, AND WALTER A. KRAMER, or GHAMBERSBURG, PENNSYLVANIA.

GRINDING-MILL.

T all whom it may concern:

Be it known that we, Annnn'r Boon, a subject of Germany, residing at Brunswick, (ilern'iauy. and human A. I{R.\MER. a citi 5 zen of thellnited States, residing at Chambersburg, in the county of Franklin and St ate of Pei'msylvania, have invented certain new and useful Improvements in Grinding- Mills; and we do hereby declare the following" to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use same, reference being had to the accompanying drawings, and to the characters of reference marked therein, which form a part of this specification.

This invention' relates to new and useful improvements in grinding mills for grain, etc.,'and relates particulz irly to the provision of adjusting mechanism whereby the fracture to the runner heads may be prevented, in the event of any foreign substances enter ing the mill.

The invention consists further in various other details of construction and combinations and arrangements of parts which will be hereinafter fully described and then speciticall v defined in the appended. claims.

()ui invention illustrated in the accompanying drawings, in which Figure 1 is a side elevation of our improved grinding mill apparatus. Fig. 2 is a vertical sectional view through the ma chine 'Fig. 3 is a sectional view vertically through a hopper and feeding shoe. Fig. 4 is a similar view showing the modified form of the hopper, and Fig. 5 is a sectional view showing the feeding mechanism adapted principally for feeding alfalfa or other material of a similar nature which would not under ordinary circumstances feed readily withoutthe screw coi'iveyer, and Fig. 6 is an enlarged detail in side elevation of the hopper. Fig. 7 is an enlarged detail view showing the ll'lQttllS for adjusting the sectional shaft and the right and left threaded lever for moving the sections of the shaft longitudinally in opposite directions.

Reference now being had to the details of the drawings by characters, A and A designate two shafts mounted in suitable bearings B upon the pedestals B. A vertically disposed! grinding head having a hub portion is fixed t0 the shaft. A and rotates within a. casing C"; C designates a second grinding Specification of Letters'Patent.

Patented June 22, 1909.

Application filed January 30, 1907. Serial No. 354,926.

receive the ball bearings E, which bearings also engage a groove formed in the bottom of the cup E. E is an apcrturcd disk in which said shaft A has a loose. bearing and the circumference of the disk E engages threads formed in the inner surface of said cup. by this construction, it will be noted that a swivel connection is provided between the cup and the disk E upon the shaft A. F is a casing or shell in which said cup has a longitudinal play, and is provided with an opening F through which access may be had to the interior thereof. A stem F projects from said cup and may be closely fitted to or have a play through an opening in the end of the shell or casing F. G designates a link which is pivoted at G to a bracket arm it of the shell or casing F, and H is a lever pivotally connected upon a pin H carried by said stem F and carries a pivot pin H which is pivotally connected to the link G. Said shell or casing is provided with a suitably braced flange F which is bolted or otherwise secured to the flange I integral with the casing containing the bearing B.

J designates a shaft which is mounted to have a longitudinal movement in a sleeve K carried by the lever H, said shaft. J being splined within the sleeve and has an adjusting wheel Q fitted upon its outer threaded end, thus affording means whereby the lever H may be adjusted, which adjustment will act upon the stem F and thus enable the heads to be adjusted for grinding any degree of fineness. The inner end of the shaft J has a coarse thread I" which engages threads formed in the wall of an opening in the double-threaded handle releasing 1 notch R. J designates a second shaft whichis mounted to have a longitudinal play in registering apertures in the flanges F'" and. l, and is splined to said flanges. Said shaft J has left threads at its inner end adapted to engage corresponding threads formed in,

the opening in said releasing doublecertain liinit.

X designates a casing which is openat one end and contains a coiled spring which bears between the transverse partition". 0' within said casing and a plunger N. which is. mounted upon the outer threaded end of the shaft J being held in place Said plunger is of.

means of the nut 0 such a diameter as to move within the case ing N asthe shaft J is moved longitudi nally toward the releasing lever, in which movementsaid spring is put. under tension.

'- C is a hopper which has a passageway.

leading to the space intermediatethe grinding disks, and mounted within said hopper is ashoeT pivoted upon a pin T, wliich whereby the shoemay have vertical adjustment. I

T designates a shaft upon which the pulley T is mounted, and an eccentric T rotates with the shaft T and is designed to give the" shoe a lateral movement as the pulley T is rotated. v

In order to provide extra precautionary means to hold the grinding disks separate, in the event of any foreign substance getting between the same, we make the pin H, which pivotal-1y connects the lever H with the stem F, of a breakable material. An eye It is fastened to the'end of the stem F and k is a wire connected to said eye andpasses over suitable pulleys h and is connected to an angle lever If, one end of which bears against-the under side of the hand wheel T whereby in the event of the pin H breaking, by reason of extra pressure coming upon the same by the separa- -tion of the grinding heads, the feeding the machine may be stopped by the wire raising the shoe. 4

Referring to Fig. of the drawings, will be seen a slight modification of the construction of the apparatus, whereby the same isadapted for use in feeding alfalfa 01' other material of a like nature, to the grinding heads. In said figure is shown a shaft W mounted beneath the hopper, and

- projecting from said shaft are the feeding fingers W, whereby'alfalfa or other material of a like nature maybe conveniently fed t'o the grindingheads. L designates a conveyor worm w "ch is loosely mounted upon the shaft A and has a chambered perhub E and the portion ofsaid conveyer .hopper in which it has a bearing,'forms a pulley A about which a belt A asses, whichbelt also passes about a pal ey A fixed to the shaft W, and designates a second pulley which is fixed to the shaftlV and has connection, through the medium .of the belt W, with 'a pulley XV which is fixed to the shaft A, thereby affording means threaded nut R, and J is a collar which is tion which is adapted to telescope over the keyed to the shaft J and serves to prevent. a movement in one. direction beyond a which projects outside the casing of the r whereby power may be imparted to the shaft WV and also to theconveyer. \Vhile and adapted to receive the hub of the grinding head C if preferred, said conveyer may be made to contact with the outer end of the hub. Y

It will be noted upon reference to Fig. 5 of the drawings that the end of the shaft A is mounted in a shell A which is mounted withiirthe hollow shell A which is fixed to the shaft A, and afiords means whereby thetwo grinding heads may be centered and kept. in proper relation to each other, even. though the grinding head C has a movement away 'from or toward the grinding head C In operation,.inthe event of any foreign substance such as a piece of metal or other hard materialgetting into the mill and betected, the quick manipulation of the releasing lever R will cause a longitudinal movement to be imparted to the shaft J, which,

cause a longitudinal movement tobc im-' parted to the shaft A, which will cause the grinding headsmay also be automaticallv bearing against the cup and through the connections of the latter with the shafts J and J, will cause the latter to move under the tension of the spring 0, and after the foreign substance 18 free from the grindin heads, the springabout the shaft J wi cause the heads to assume their normal positions. I

.By'the revision of the. mechanism connected wit the shoe, the latter may berg: justed when in motion or stationary, the y regulating the feed and enabling t shoe to be wide open if desired.

What we claim is 1. A inding mill comprisingtwo rotatable sha 5, one of which is adapted to have a longitudinal movement, a grinding head sewe have shown the .conveyer as chambered tween the grinding disks and the same is de-.

through its connections with the cup E will withdrawn from each other by the shaft A.

cured to each shaft, a spring-actuatedment' of the shaft J in one direction while the shaft J is quickly moved to the left. The no threaded shaft, a stem having swivel connection with said longitudinally movable shaft, a lever having pivotal connections with said stem, a link pivoted to the frame of the apparatus at one end and its other end to said lever, a threaded shaft supported in a suitable bearing on said lever, a wheel upon the outer threaded end of said shaft carried by the lever, a double-threaded handled releasing nut engaging the adjacent threaded ends of the spring-actuated and lever supporting shafts, as set forth.

2. A grinding mill comprising two rotatable shafts, one of which is adapted to have a longitudinal movement, a grinding head secured to each shaft, a stem swiveled to the longitudinally movable shaft, a pivotal lever connected to said stem, a threaded shaft supported by said. lever, a spring actuated threaded shaft, a double-threaded handled nut engaging the adjacent threaded ends of said spring-actuated and lever supporting shafts, a feeding hopper, a vibrating shoe in said hopper, a rotatable cam for vibrating said shoe, a shaft upon which the cam is mounted, connections between said stem and shoe and adapted for raising the latter in the event of foreign matter entering between the grinding heads and imparting a longitudinal movement to said stem, as set forth.

'3. A. grinding mill comprising two r0- tatable shafts,'one of which is adapted .to have a longitudinal movement, a grindin head secured to each shaft, a stem swivele to the longitudinally movable shaft, a pivotal lever connected to said stem, a threaded shaft supported by said lever, a spring actuated threaded shaft, a double-threaded handled nut engaging the adjacent threaded ends of said spring-actuated and lover supporting shafts, a feeding hopper, a vertically pivoted pin within said hopper, a vibratin shoe mounted in an eye in said p a rod pivotall connected to the free swinging end of the sme, a button fixed to said rod. a bell crank lever engaging said button, and connections between said angled lever and said stem and so arranged that, as the stem is moved in one direction, the shoe may be raised, as set forth.

4. A grinding mill comprising two rotatable shafts, one of which is adapted to have a longitudinal movement, a grinding head secured to each shaft, a spring-actuated threaded shaft, a stem having swiveled connection with said longitudinally movable shaft, a lever having pivotal connections with said stem, a link pivoted to the frame of the apparatus at one end and its other end to said lever, a threaded shaft mounted in suitable bearings upon said lever, a wheel upon the outer threaded end of said shaft carried by said lever, a double threaded hanlever supporting shafts, a p unger'fixed to said spring-actuated shaft, a casing in which .the plunger is mounted, a collar fixed to the springactuated shaft, and a adapted to limit the movement. of the collar in one direction, as set forth.

5. A grinding mill comprising two rotatable shafts, each of whichvis adapted to have a longitudinal movement, a rinding head secured to each shaft, one of said shafts having a disk, a cup shaped member, a shell in which the latter is mounted, ball bearings intermediate the bottom of the cup and the disk, means for holding the latter within the cup, a stem integral with said cup and extending through an aperture in said shell, a lever pivoted to said stem, link connections between said lever and shell, a threaded nesses.

" ALBERT BOCK.

WALTER A. KRAMER. Witnesses WV. En. FINNEY,

Jonn- Hons'r.

dled releasing nut engaging the adjacent- I threaded ends of the sprin -actuated and standard shaft carried by said lever, adjusting wheel 

